Fixing the dreaded scratch on rear element of a lens

I acquired this lens on an "as-is, no returns, are you that !&##*% stupid to be buying this" auction deal. This is a Rodenstock 300mm f9 to f64 APO- Gerogon lens made for an enlarger but easily adaptable to a large format soviet FKD 18x24cm view camera. The lens was only a few dollars for good reaso...
By: dkeating2

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